<template>
<div class="app-container">
<!-- 展示树形结构 -->
  <el-tree default-expand-all :data="depts" :props="defaultProps">
<!-- 节点结构-->
<!-- v-slot={ node, data } 只能作用在template -->
    <template v-slot="{ data }">
      <el-row style="width: 100%;height: 40px" type="flex" justify="space-between" align="middle">
        <el-col>{{ data.name }}</el-col>
        <el-col :span="4">
          <span class="tree-manager">{{ data.managerName }}</span>
          <el-dropdown @command="operateDept($event, data.id)">
          <!-- 显示区域内容 -->
            <span class="el-dropdown-link">
              操作<i class="el-icon-arrow-down el-icon--right"></i>
            </span>
            <!-- 下拉菜单选项 -->
            <el-dropdown-menu slot="dropdown">
              <el-dropdown-item command="add">添加子部门</el-dropdown-item>
              <el-dropdown-item command="edit">编辑部门</el-dropdown-item>
              <el-dropdown-item command="del">删除</el-dropdown-item>
            </el-dropdown-menu>
          </el-dropdown>
        </el-col>
      </el-row>
    </template>
  </el-tree>
  <!-- 添加弹层组件 -->
  <!-- sync会接收子组件的事件 update:showDialog 值 => 属性 -->
  <AddDept ref="addDept" @updateDepartment="getDepartment" :current-node-id="currentNodeId" :show-dialog.sync="showDialog"></AddDept>
</div>
</template>

<script>
import { getDepartment, delDepartment } from '@/api/department'
import { transListToTreeData } from '@/utils'
import AddDept from "@/views/department/components/add-dept.vue"

export default {
  name: "Department",
  components: {
    AddDept
  },
  data () {
    return {
      currentNodeId: null, // 当前点击的id
      depts: [],
      defaultProps: {
        children: 'children', // 设置子节点的字段名
        label: 'name' // 设置显示内容的字段名
      },
      showDialog: false // 控制弹层的显示与隐藏
    }
  },
  created() {
    this.getDepartment()
  },
  methods: {
    async getDepartment () {
      const res = await getDepartment()
      console.log(res)
      this.depts = transListToTreeData(res,0)
    },
    // 操作部门方法
    operateDept(type,id) {
      // 添加部门
      if (type === 'add') {
        this.showDialog = true
        this.currentNodeId = id
      } else if (type === 'edit') {
        // 编辑部门
        this.showDialog = true
        // 记录id 要用它来获取数据
        this.currentNodeId = id
        // 更新props - 异步动作
        // 直接调用组件的方法 同步的方法
        // 要在子组件获取数据 父组件调用子组件的方法来获取数据
        this.$nextTick(() => {
          this.$refs.addDept.getDepartmentDetail() // this.$refs.addDept等同与子组件的this
        })
      } else {
        // 删除部门
        this.$confirm('您确认要删除该部门吗').then(async () => {
          await delDepartment(id)
          // 提示消息
          this.$message.success('删除部门成功')
          // 初始化列表
          await this.getDepartment()
        })
      }
    }
  }
}
</script>

<style scoped>
 .app-container {
   padding: 30px 140px;
   font-size: 14px;
 }

 .tree-manager {
   width: 50px;
   display: inline-block;
   margin: 10px;
 }
</style>
